CN203350522U

CN203350522U - 16mm wide aperture day and night fixed focus lenses

Info

Publication number: CN203350522U
Application number: CN201320385152.9U
Authority: CN
Inventors: 张品光; 何剑炜; 邹玉
Original assignee: Dongguan Yutong Optical Technology Co Ltd
Current assignee: Dongguan Yutong Optical Technology Co Ltd
Priority date: 2013-06-28
Filing date: 2013-06-28
Publication date: 2013-12-18
Anticipated expiration: 2023-06-28

Abstract

The utility model discloses 16mm wide aperture day and night fixed focus lenses. The 16mm wide aperture day and night fixed focus lenses comprise the first convex and concave positive focal power lens, the second convex and concave negative focal power lens, the third double concave negative focal power lens, the fourth double convex positive focal power lens, the fifth double convex positive focal power lens and the sixth convex and concave positive focal power lens which are sequentially arranged along a light incidence direction, wherein the third lens and the fourth lens are bonded through optical glue, the lenses employ a positive, negative, negative, positive, positive, positive, five-group, six-sheet structure and have a simple structure. A relatively compact volume of the lenses is realized through reasonable focal power distribution, tolerance susceptibility is further reduced, and an assembling yield is improved; chromatic aberration and spherical aberration are corrected through reasonable arrangement of the bonded lenses, imaging quality is greatly improved, so high-definition requirements can be fully met; an F1.4 wide aperture is realized through reasonable use of glass combination, the imaging quality is excellent, no infrared defocus can be realized, intelligible and bright frames can be realized even under low illumination night conditions.

Description

16mm large aperture day and night tight shot

Technical field

The utility model relates to field of optical lens, refers to especially a kind of 16mm large aperture day and night tight shot.

Background technology

Tight shot is multiplex has fast response time in the monitoring of fixed scene, the advantages such as good imaging quality.The 16mm tight shot is a kind of more common telephoto lens, has the very strong ability far away of taking the photograph, and can photograph distant place than the details of wisp, therefore is widely used in forest fire prevention and control, and square monitoring etc. need the occasion of long distance detection.The development trend of camera lens is miniaturization and high Qinghua at present, yet, traditional 16mm camera lens is limited to the machining eyeglass ability, and often to exist clear aperature smaller, have that image quality is not high, purple boundary is serious, the whole defect such as penetrating not of picture, and the high-aperture lenses design difficulty is larger, therefore traditional large aperture 16mm camera lens is used eyeglass quantity many, makes the complex structure of camera lens, volume is large, and cost is high; And often the tolerance susceptibility is also higher for the high camera lens of image quality, make that the camera lens manufacture difficulty strengthens, cost is high.Therefore designing the 16mm tight shot that a kind of image quality simple in structure is high just seems particularly important.

The utility model content

The purpose of this utility model is to provide a kind of compact conformation and the high 16mm large aperture day and night tight shot of image quality.

For achieving the above object, the technical solution adopted in the utility model is as follows:

A kind of 16mm large aperture day and night tight shot, comprise the first lens of the convex-concave positive light coke set gradually along the light incident direction, the second lens of convex-concave negative power, the 3rd lens of concave-concave negative power, the 4th lens of biconvex positive light coke, the 5th lens of biconvex positive light coke, the 6th lens of convex-concave positive light coke, the 3rd lens and the 4th lens are bonding by optical cement; The focal length of the six-element lens of this camera lens, refractive index reach the radius-of-curvature of totally ten two curved surfaces and meet the following conditions respectively:

23.959≤f1≤24.761	1.61≤n1≤1.67	9.89≤R1≤11.02	23.22≤R2≤24.101
				-28.753≤f2≤-29.885	1.42≤n2≤1.53	8.78≤R3≤9.65	4.87≤R4≤5.66
-6.02≤f3≤-6.96	1.79≤n3≤1.87	-6.02≤R5≤-6.95	50.23≤R6≤50.99
				11.565≤f4≤12.631	1.65≤n4≤1.73	50.23≤R7≤50.99	-9.31≤R8≤-10.11
17.233≤f5≤18.102	1.65≤n5≤1.72	50.89≤R9≤51.66	-15.13≤R10≤-16.26
				35.022≤f6≤36.221	1.63≤n6≤1.69	10.55≤R11≤11.25	16.35≤R12≤17.41

In upper table, " f " is focal length, and " n " is refractive index, and " R " is radius-of-curvature, and "-" number means that direction is for negative.

Further, described first lens and the second lens are by the spacer ring close-fitting, and the axial spacing at optical axis place is 0.1mm; The second lens and the 3rd lens are by the spacer ring close-fitting, and the axial spacing at optical axis place is 6.07mm; The 4th lens and the 5th lens are by the spacer ring close-fitting, and the axial spacing at optical axis place is 0.75mm; The 5th lens and the 6th lens are by the spacer ring close-fitting, and the axial spacing at optical axis place is 3.5mm.

A kind of 16mm of the utility model large aperture day and night tight shot is just adopting, negative, negative, just, just, positive 5 group of 6 slice structure, simple in structure; Reasonably distribute focal power to make the camera lens volume compact, and reduced the tolerance susceptibility, promoted the assembling yields; The gummed eyeglass reasonably is set and makes aberration and spherical aberration be revised, image quality promotes greatly, can meet the demand of high definition fully; Realize the F1.4 large aperture by reasonable use glass combination, image quality is good, and makes infrared not out of focus, even also can realize clear bright picture at night under low-light (level).

The accompanying drawing explanation

The assembly drawing of each lens that Fig. 1 is 16mm of the present utility model large aperture day and night tight shot.

The optical system diagram of the 16mm large aperture day and night tight shot that Fig. 2 is Fig. 1.

Embodiment

For the technical solution of the utility model can more clearly be showed, below in conjunction with accompanying drawing, the utility model is described in further detail.

With reference to a kind of 16mm large aperture day and night tight shot shown in figure 1 and Fig. 2, comprise first lens L1, the second lens L2 of convex-concave negative power, the 3rd lens L3, the 4th lens L4 of biconvex positive light coke of concave-concave negative power, the 5th lens L5 of biconvex positive light coke, the 6th lens L6 of convex-concave positive light coke of the convex-concave positive light coke set gradually along the light incident direction; First lens L1 and the second lens L2 are by the spacer ring close-fitting, and the axial spacing at optical axis place is 0.1mm; The second lens L2 and the 3rd lens L3 are by the spacer ring close-fitting, and the axial spacing at optical axis place is 6.07mm; The 3rd lens L3 and the 4th lens L4 are bonding by optical cement; The 4th lens L4 and the 5th lens L5 are by the spacer ring close-fitting, and the axial spacing at optical axis place is 0.75mm; The 5th lens L5 and the 6th lens L6 are by the spacer ring close-fitting, and the axial spacing at optical axis place is 3.5mm.

The focal length of the six-element lens of this camera lens, refractive index reach the radius-of-curvature of totally ten two curved surfaces and meet the following conditions respectively:

This tight shot is just adopting, negative, negative, just, just, positive 5 group of 6 slice structure, simple in structure; Reasonably distribute focal power to make the camera lens volume compact, and reduced the tolerance susceptibility, promoted the assembling yields; The gummed eyeglass reasonably is set and makes aberration and spherical aberration be revised, image quality promotes greatly, can meet the demand of high definition fully; Realize the F1.4 large aperture by reasonable use glass combination, image quality is good, and makes infrared not out of focus, even also can realize clear bright picture at night under low-light (level).

Above embodiment just is explanation rather than restriction the utility model, and the equivalence of doing according to the described method of the utility model patent claim therefore all changes or modifies, and is included in the utility model patent claim.

Claims

1. a 16mm large aperture day and night tight shot, it is characterized in that: comprise the first lens of the convex-concave positive light coke set gradually along the light incident direction, the second lens of convex-concave negative power, the 3rd lens of concave-concave negative power, the 4th lens of biconvex positive light coke, the 5th lens of biconvex positive light coke, the 6th lens of convex-concave positive light coke, the 3rd lens and the 4th lens are bonding by optical cement; The focal length of the six-element lens of this camera lens, refractive index reach the radius-of-curvature of totally ten two curved surfaces and meet the following conditions respectively:

2. a kind of 16mm according to claim 1 large aperture day and night tight shot is characterized in that: described first lens and the second lens are by the spacer ring close-fitting, and the axial spacing at optical axis place is 0.1mm; The second lens and the 3rd lens are by the spacer ring close-fitting, and the axial spacing at optical axis place is 6.07mm; The 4th lens and the 5th lens are by the spacer ring close-fitting, and the axial spacing at optical axis place is 0.75mm; The 5th lens and the 6th lens are by the spacer ring close-fitting, and the axial spacing at optical axis place is 3.5mm.